Dust-collector.



. Patented luly i5, |902. L. Ri. WHITNEY.

DUST GDLLclI'I'OR v (Applicaton led Det, 16, 1901.) y w dem y s sheets-sheet' l,

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)LHT-www Patented luly I5, |902.

L. H. WHITNEY. DUST cu'LLEcTun.

(Application tiled Oct. 16, 1901.)

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No. 764,724. Patented my l5, 1902.

L. WHITNEY.

DUST co-LL-ECTQH.

(Application iled Oct. .15, 1901.)

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UNITED STATES,

PATENT OEEICE.l

LEMUEL R. IVHITNEY, OF MILVAUKEE, WISCONSIN.

oust-ooLLECTQR.V

SPECIFIGATIONforming part of Letters Patent No. 704,724, dated July 15, 1902.

Application tiled ilctoher 16, 1901. Serial No. l877l. (No model.)

To @ZZ ifo/tom, it may concern:

Beit known that I, LEMUEL R. WHITNEY, a citizen ot' the United States, and a resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvement-s in Dust-Collectors; and I do hereby declare that the following'is a full, clear, and exact description thereof.

My invention has especial reference to dustcollectors designed for use in Hour-mills; and it consists in certain peculiarities of construction and combination of parts, as will be fully set forth hereinafter in connection with the accompanying drawings and subsequently claimed.

In the said drawings, Figure l is a vertical central sectional view through a device embodying my present invention with portions broken away to better illustrate certain details of construction. Figs. 2 and 3 are horizontal sectional views taken on the planes indicated by the lines A A and B B, respectively, in Fig. 1. Fig. 4 is a'detail sectional view taken on the plane indicated by the line C C in Fig. 2. Fig.` 5 is a detail sectional view on the line D D of Fig. 1 looking downward. Fig. 6 is a detail sectional view on the line E E in Figs. l and 4, drawn to an enlarged scale, looking upward. Fig. 7 is a detail sectional view illustrating the joint between the upper revolving plate and adjacen t lower stationary plate, taken at the point indicated by the line F F in Fig. 2 and drawn to a greatly-enlarged scale; and Fig. 8 is a detail sectional view on the line G G in Fig. 1.

Referring to the drawings, thenumeral 1 represents the base or platform of the dust'- collector, and 2 2 designate the standards or uprights secured to and rising therefrom.

3 4 represent bracket-arms secured to and projecting upwardly and outwardly from the base 1, said arms terminating in transverse bearings for the reception and support of the horizontal shaft 5, carrying the power-pulley 6 at its outer end for the reception of belting (not shown) from any convenient source of power. The shaft 5 has fast thereon a gear- Wheel 7, which meshes with a like wheel 8,A

fast on a vertical shaft 9, whose lower end is stepped in a vertical bearing 10 on the upper end of the arm 4 just above the transverse bearing for the shaft 5, the upper end of said vertical shaft 9' being supported by a bearing 11, projecting from the annular flange of a stationary plate l2, which flange is provided with a number of outwardly-projecting perforated lugs 13 13,.which rest upon lugs'14 14, thatproject'inwardly from the standards vor uprights 2 2 and have vertical pins 15 15 for engagennent with the perforations in the vplate-lugs 13 13, just named, whereby the said plate 12 is kept stationary.' The plate 12 is an annular plate or :dat ring formed with circumferential openings .16 16, which extend around about two-thirds of the plate and which are continuous, save for narrow strips 19 19, left To strengthen the plate, the same being a solid plate for the balance, eX- cept for one large opening 17 and a series of small openings 18 18 18. Just below the open,- ing 17 is a discharge-pipe 20, leading downward to a convenient point of delivery for the dust to be collected by the machine, as hereinafter explained, and beneath the small holes 18 18 there is a closed chamber 21, whose wall is-joined io the discharge-pipe 20, the adjacent wallof the pipe 2O being formed with a swing-valve 22, as `shown in Fig. 4, so as to close or open communication between the said pipe 2O and chamber 21, and a suction-pipe 23 leads from the said closed chamber 21, all as hereinafter set forth.

Extending across and secured to the base or platform 1 is a bar 24,. said cross-bar having an upper webvor flange from which rise arms 25, terminating in dat supporting-.plates 26, to which is bolted, asshown at 27, the llower plate 28 of a stationary drum or casing having an upper plate 30, thesaid upper and lower plates being formed with projecting perforated ears, whereby they are held together against the edges of the intervening vertically-disposed annular band 29 by bolts 3l and nuts, as best shown in Fig. 1. The said lower plate 28 of the stationary drum or casing is formed with an opening therein, from which a branch discharge-pipe 32 extends to and communicates with the hereinbeforenamed main discharge-pipe 20.

The described cross-bar 24 is centrally provided with a vertical bearing 33 on its upper side for the reception of the lower end of a vertical spindle 84, rendered adjustable by screw 35, said spindle passing through the IOO described stationary drum or casing and through the hub of a revolving drum within the said stationary drum or casing, as hereinafter described, and up through a central bearing 36 of the stationary plate 12 and through the hub 37 of an upper revolving annular plate, hereinafter described, the spindle 34 being secured to said hub 37 by setscrew 38, the bearing 36 being supported by arms 39 39 from the inner periphery of the annular stationary plate 12, so as to merely form a guide for the spindle 34, which revolves freely Within said bearing 36. Below this pointand above the described stationary drum or casing the spindle 34 carries a circular deflecting-disk 40, whose hub is secured to said spindle by set-screw 41, and below the disk there is secured to said spindle by set-screw 42 a brush 43, which thus revolves with the spindle 34 and sweeps the top of the upper plate 30 of the stationary drum or casing, said plate 30 being cut away for something more than half its area to form the opening 44, through which the dust is swept by said brush 43 from the solid portion of the said plate 30 into the revolving drum below, now to be described. The said revolving drum is formed of upper and lower wheels having hubs 45 46, held to the vertical spindle 34 in any suitable manner and having spokes 47 48 radiating therefrom to their respective rims 49 50, the spokes and rim of the upper wheel being connected to the spokes and rim ot' the lower wheel by metallic plates 5l 5l, so as to form an annular series ot' triangular buckets open at top and bottom. 'lhe said spokes are shouldered on each side, as best shown in Fig. 8, and the hubs and rims are shouldered on one side, so that the metal plates 5l, which form the open buckets, are bent over and secured to the shouldered surfaces of' the rims, spokes, and hubs, this construction leaving a central longitudinal rib on the outer surfacesY of the said spokes, the ribs on the underside of the lower wheelspokes 48 forming Scrapers which bear upon the upper surface ot' the lower plate 28 of the stationary drum or casing in the movement of the described revolving open bucket-drum. A hopper-shaped chamber formed of conical walls 52 extends from the upper plate 30 of the said stationary drum or casing to the lower outer annular flange of the hereinbefore-described stationary plate 12, said walls being provided with a hand-hole for access to the interior ot' the said chamber, the opening being closed by a removable plate 53. Resting on the said stationary plate 12 is an annular revolving plate comprising a central ring 54, connected by spokes 55 55 to the hereinbefore-named hub 37 and by radial fiat arms 56 56 to an outer ring 57, the latter having a Y said annular revolving plate is driven from the power-pulley 6, hereinbefore named.

Supported by bolts 61, extending through the inwardly-inclined upper ,ends of the described standards or uprights 2 2, is a ring 62, which for a portion of its circumference is formed with a downward-depending flange 63, having notches formed with oblique upper walls in its under side, the said ring 62 having inward-extending arms 64 for the support of a central ring 65, formed with upper and lower annular flanges, and a cylinder 66 has loose fit at its upper end with the downward Iiange of said ring 65, the lower end of saidcylinder 66 being riveted to an upwardextending annular flange 67 on the described central ring 54 of the annular revolving plate. Resting on the said annular revolving plate is a continuous series of sector -plates 69, each with a longitudinal oval opening therethrough, said plates being secured tothe said revolving plate and occupying the entire space between its outer and inner upper annular anges 58 67, the side walls of the oval openings corresponding substantially with the edges of the flat radial plate-arms 56 beneath and the inner and narrow ends of the sector-plate 69 being shouldered or rabbeted, so as to fit in under an outward annular flange 70 on the hereinbetore-named upward annular flange 67 on the central ring 54 of the said annular revolving plate.

Rising from the sector-plate 69 are series of outer standards 71 with forked feet 72 72, bolted to the sector-plates, and series of inner standards 73, similarly bolted to said plates, the outer standards being connected together by strengthening-strips 74, bolted to the standards, so as to make a continuous band, and above the plane of this band the said standards 7l are offset outwardly, so as to have horizontal portions 75 and thence vertical continuations 76 with vertical slots 77 therein. The inner standards 73 are similarly offset, but in an opposite direction, so as to have horizontal portions 78 with vertical continuations 79, formed with vertical slots 8O therein, and the upper ends of the said outer and inner standards are united by cross-bars 8l. 82 82 designate vertically-movable cross-bars, whose ends have play within the said slots 77 80 of the described standard continuations 76 79. These movable crossbars 82 have central upward-projecting ears 83 and bolts 68, to which are pivotally secured levers 84, whose long ends extend outwardly through the described slots 77 and carry at their outer ends rollers 85 for engagement with the notched lower surface of the hereinbefore-named downward-depending flange 63 of the ring 62, the short inner ends of said levers 84 bein gin contactwith the lower ends of adjustingscrews 86, passed downwardly through the stationary crossbars 8l above. The movable cross-bars 82 are provided with depending pins 87 87, one

IIO

adjacent to each end, which project through operation.

holes in the described horizontal portions 75 78 of the outer and inner standards, spiral springs 88 8S surrounding said pins between the said horizontal portions of the standards and the said cross-bars 82. Secured to the under sides of the movable cross-bars 82, as by screws 89 S9, are longitudinal blocks 90 with grooved edges, against which are placed the upper edges of bag-screens 91, formed of suitable fabric'secured in place by wires 92. The lower edges of said bag screens are spread out to correspond with the shape of the described oval openings in the sectorplates 69, which are undercut all around said openings, as best shown in Fig. 7, and the saidv lower ends of the bag-screens 91 secured in place thereto by oval wire frames 93, after which the inner reduced ends of said sectorplates 69 are slipped under the described outward annular flange on the Aupward tlange 67 ofthe central'ring 54C of the annular revolving plate and the outer ends of said sector-plates are secured by screws 94: to the outer ring 57 of said revolving plate.

It is essential that there should be an airtight joint between the stationary plate 12 groove 98 and the tlexible strip 95 held to this vgroove by the wire ring 99, whereby the escape of air is prevented and the upper annular plate permitted to freely revolve.

100 represents an elbow-pipe, whose lower end lits within the hereinbefore-named upper annular flange on the described upper central ring 65 of the machine, and tok the outward end of this elbow-pipe a line of pipe may beV attached to any suitable blower-fan, which I have not deemed `necessary to illustrate, the said elbow-pipe 100 being capable' of being turned aroundinany direction toaccommodate the machine to the location of the blower.

The operation of my device will be readily understood from the foregoing description of its construction, takenin connection with the accompanying drawings. Dust-laden air is blown into the elbow-pipe 100' andV power is applied to the power-.pulley 6, whereby the movable parts of the machine are put into The cylinder 6G and. conical walled chamber belowbeing closed, the only outlet for` the air is up through the openings in the stationary and `revolving plates and through the-bag-screens 91, which latter permit the air to escape, but free it from the dust, some of which drops down and the balance adheres to the inner surfaces of the said bag-screens. Of the dust that falls down some passes through the open buckets formed bythe plates 5l of the lower revolving drum and other dust falls upon the closed portion of the upper plate 30 of the stationary drum or casing, from whence it is swept by the reinto* the branch discharge-pipe 32, from whence it passesto the main discharge-pipe 2O and outV at the lower end of said pipe. In use'the inner surfaces of the bag-screens 91 become coated-with dust, and it 4becomes necessary to dislodge same, and therefore as the upper plate,which carries the bag-screens, revolves it passes .under the notched flange G3 ofthe upper ring 62, and the inclined up? Y per walls of said notches, engaging with the rollers S5 at the ends of the levers 84, depress the movable cross-bars 82,to which the blocks 9() are secured, and thereby depress andcollapse the bag-screens 91,.whose upper ends are fast to `said blocks 90, as the rollers ,S5 encounter the lowest points of the described notch-walls, and as these points are passed in the continued revolution of the said upper plate the springs 8S 88 force the cross-bars S2 1 suddenly upward, carrying them and the attached upper ends of the bag-screens from the position shown at the left in Fig. 1 to the positions shown at the right in said ligure with aV sudden shock or jar, which dislodges the dust from the bag-screens and permits it to fall down rupon the stationary plate 12 below, some of the dust falling directly through the opening 17 into the discharge-pipeQO below and some falling upon-the solid portion of IOC said plate 12whenceit is swept bythe arms 56 of the revolving plate down through the said opening 17 as said arms pass over the plate 12 in close contact there with, As thedustis blown against the inner surfaces of the bag-screens der the influence ofthe Vdescribedshock'and .jar to which the bag-screens are subjected IIO there is a tendency for suchl finer particles to be shakenoutside of the screens, and to f guard against this l have employed the hereinbefore-named pipel 23, leadingifrom the -closed chamber 21, said pipe beingconnected to a suction-fan and the stationary plate 12 above said closed chamber being provided ,with a series of small Vopenings 18 18, asalready stated, and henceat the same time that the ratchet `rapping operation of lthe Aratchet-toothed ilange 63 takes place the bagjarred and down through the openings 18 `18 -into the closed4 chamber 21, thus obviating ithe danger referred to, and when any consid,-

erable quantity of this ne dust has collected in said chamber the mass will press against the swing-valve 22 and open it, so that said dust will fall out into the main dischargepipe by gravity, the suction in the said chamber otherwise keeping the said swing-valve While I have illustrated the preferred construction of my device, I do not limit myself to the precise mechanical details herein shown and described, as same may be varied within the scope of my claims without departing from the essence of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a dust collector, the combination with a revoluble support,of a series of yielding screens supported thereby, and having pivotally-attached levers at their upper ends,and a suitable frame provided with a ring formed with a downward-depending flange having oblique-walled notches in its under side, in engagement with said levers, for depressing and collapsing said screens as they reach given points, and for restoring them to their normal positions after passing such points.

2. In a dust collector, the combination with a suitable frame, of a revoluble plate supported thereby, and formed with an annular series of openin gs 5 an annular series of outer and inner supports rising from said plate, having offset slotted upper continuations; spring-actuated cross-bars movable in said slots; a flange having oblique-walled notches in its under side secured to said frame; levers pivotally attached to said movable cross bars for engagement with said notched flange; and yielding bag-screens secured to said movable cross-bars, and to the revolving plate at the lines of the openings therein.

3. In a dust collector, the combination with a suitable frame, of a revoluble plate supported thereby, and formed with a series of openings; aseries or" dust-collecting screens carried by said revoluble plate and communicating with said openings; a stationary drum or casing below said revolving plate having openings in its upper and lower plates; avertical revoluble spindle extending through said drum or casing and secured to said revoluble plate; a revoluble drum secured to said spindle within said stationary drum or casing, and formed with an annular series of open-ended buckets; an air-tight wall forming a closed chamber around the vertical spindle, between the revoluble plate and the stationary drum or casing;"a brush secured to said spindle and in sweeping engagement with the upper plate of the stationary drum or casing; and a dust-discharge pipe leading from the opening in the lower plate of said drum or casing.

l. In a dust collector, the combination with a suitable frame, of an annular stationary plate supported thereby said plate havinga solid portion with a dust-discharge opening and a series of small openings therethrough, and the balance of said plate having a series of large air-inlet openings therethrough; a dust-discharge pipe leading from the dust-discharge opening in the solid portion of said plate, and a'closed chamber beneath the small openings therein, adjacent to the dust-discharge pipe and havinga swingvalve communication therewith; a suctionpipe leading from said closed chamber; an upper annular plate resting and revoluble on said stationary plate, and formed with an annular series of openings; an annular series of yielding bag-screens, supported on said annular revoluble plate and communicating with the openings therein; a closed chamber beneathY the air-inlet openings in said stationary plate; an inlet for dust-laden air leading to said last-named closed chamber; and means for depressing and collapsing said screens as they reach given points, and for restoring them to their normal positions after passing such points.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of Wisconsin, in the presence of two witnesses.

. LEMUEL R. WHITNEY.

Witnesses:

I-I. G. UNDERwooD, B. C. RoLoFF.

IOC) 

